KillBot - Stops the bots

KillBot's goal is to eliminate various types of web based robots ('bot's, scripts, etc.) from repeatedly abusing your forms by requiring the visitor to enter some simple data (called a Turing or CAPTCHA test). Many times you may have a form (registration, feedback, poll, guestbook, etc.) on your web site and a malicious user uses their script to automatically fill out your form until it either cripples your server, skews statistics, or floods your inbox or database with SPAM. By requiring the visitor to read the text in an image and enter that with the other data in your form, you can stops these bots in their track.


An example of our free

Why trust third party solutions when you can easily run KillBot on your own server? If you use a service to provide you with CAPTCHAS and their service goes down, or they drop off the face of the earth, you're left high and dry. With KillBot running on your web server you never have to worry that your protection will go away when you need it most.

Check out the demo forms below! If you find an image too difficult to read, simply click on it to load a new one. KillBot can be set to be case-sensitive or case-insensitive, and it can be set to display only uppercase or only lowercase. KillBot can also be customized to fit your site's theme or layout.

For ultimate accessibility we also offer KillBot with Audio. For visitors that are unable to read the KillBot code, they can listen to an audio file that will play the code for them (via Flash). KillBot with Audio also complies with the Americans with Disabilities Act.

KillBot with Audio

KillBot with Audio improves upon KillBot by adding an audio cue that will play the code you see on screen. If you are unable to read the visual cue, now you can listen to the cue and enter the code. Having an audio cue further ensures that all your visitors will be able to pass this simple authentication test. For convenience and compatibility, KillBot with Audio presents the audio cue in Flash format. Now your visitors that have difficulty reading a scrambled code can simply listen to it, making your forms compliant with the Americans with Disabilities Act.

KillBot Professional

An example of
KillBot Professional

KillBot Professional is the web's original Flash CAPTCHA. KillBot Professional builds upon the strengths of KillBot to create a truly dynamic form of authentication. Even stronger than the image-based version, KillBot Professional uses Flash to constantly keep the security code in some form of motion so that humans can easily read it while computer's can't. KillBot Professional also generates over 65 MILLION codes, not counting the variations created via the various Flash effects. It's so good it's in use by the United States Federal Government.

Check out a gallery of just a few of the different effects you can employ with KillBot Professional.

KillBot Professional with Audio

Quite simply, KillBot Professional with Audio = KillBot Professional (plus Audio!).

Compare Versions

  KillBot Killbot
with Audio
KillBot Professional
with Audio
Over One Million Codes check check check check
PHP GD Required check check    
Audio Alternative   check   check
Animation     check check
Custom Logo/Colors     check check
Support Included   check check check
  Free $99 $1299 $1899


To Purchase or Download

To purchase KillBot with Audio, KillBot Professional, or KillBot Professional, contact us and we will work with you to meet your needs. To download the FREE basic version of KillBot, click here.


To see if your web server's installation of PHP can run the image generation part of KillBot, try this test script:

header ("Content-type: image/png");
$im = @imagecreatetruecolor (250, 20) or die ("Cannot Initialize GD image stream");
$text_color = imagecolorallocate ($im, 255, 255, 255);
imagestring ($im, 2, 5, 5, "Your PHP installation can create images!", $text_color);
imagepng ($im);
imagedestroy ($im);